The Vikings.com 2018 Free Agency Primer series uses NFL.com’s Top 101 Free Agents list to break down this year’s class. We will count down the groups of players until March 14 when free agency is scheduled to open.

The list was composed by Gregg Rosenthal and Chris Wesseling of NFL.com. Career stats are taken from NFL.com and/or pro-football-reference.com and apply to regular seasons, unless noted.

Note: The list may end up changing prior to free agency opening, but this breakdown is updated as of March 5.

This grouping of potential free agents includes Vikings quarterbacks Teddy Bridgewater and Sam Bradford, who have contracts set to expire on Wednesday.

It also includes a productive group of defensive backs, ranging from Super Bowl XLIX hero Malcolm Butler to Rams corner Trumaine Johnson and Redskins corner Bashaud Breeland. The only certainty is that Lamarcus Joyner will not be on the market because the Rams opted to use the franchise tag on him.

Butler advanced from UDFA (undrafted free agent) to INT (interception that sealed Super Bowl XLIX against Seattle) to DNP (did not play in Super Bowl LII because of a coach’s decision) in four seasons with New England. Butler’s best numbers were in 2016 when he had career highs of four interceptions and 16 passes defensed.

Franchise tagged in each of the past two seasons by the Rams, the 2012 third-round pick out of Montana could be heading to his second NFL team and third NFL city (St. Louis, Los Angeles, ?). Johnson totaled seven interceptions in 2015, and he has a pick six in three of the past four seasons.

Bridgewater had an impressive rookie season when an injury to Matt Cassel pressed him into action and went 11-5 as a starter to help Minnesota win the NFC North. A devastating knee injury just before the 2016 season derailed the continued progression of the 2014 first-round pick. Bridgewater worked hard to rehab his knee, but he has only appeared in one game since.

Acquired via trade in the days after Bridgewater’s injury, Bradford stepped in quickly and won his first four games under center with Minnesota before injuries on the offensive line caught up with the Vikings in 2016. He dazzled in the 2017 season-opener against New Orleans but aggravated a knee injury and only made one other start last season. He was relieved in that game at Chicago and the rest of the season by Case Keenum.

A fourth-round pick in 2014, Breeland recorded a career-best 19 passes defensed in 2017. His one interception last season was a career-low, but he made it count, returning the ball 96 yards for a touchdown against the Chargers.

17. T Nate Solder

98 games; 95 starts; four Super Bowl appearances

Coming in at 17 on this list, the 17th overall pick of the 2011 NFL Draft has plenty of regular-season and postseason experience. Solder has played at least 15 games in six of seven seasons. He missed 12 games in 2015 but bounced back to start all 31 games he’s played the past two seasons.

Previously a nose tackle for the Chiefs, the 2012 first-round selection shifted to a 4-3 in his first season with the Falcons. He helped Atlanta rank ninth in rushing yards allowed and sixth in rushing touchdowns allowed in 2017. Poe has missed just two games in six pro seasons.

19. G Justin Pugh

63 games; 63 starts

The 19th overall pick of the 2013 NFL Draft, Pugh missed eight games in 2017 and five in 2016. Pugh started all 16 games at right tackle and garnered selection to the NFL All-Rookie Team. He has started games at right tackle, left tackle and guard for the Giants.